Italian Reliquary Cross
Many Italian Franciscan communities commissioned works of art that used translucent enamel, which has the same visual effect as stained glass. Stained glass reflects medieval concepts of vision and materiality. It is believed to have diminished the gap between heaven and earth. Eye-catching visual elements, such as rock crystals and translucent enamel that has the effect of stained glass demonstrates the increasing interest in new visual methods to communicate and evoke religious devotion. (3) It also reveals the rising relevance of material in religion and importance of studying visual forms of religion.
(1) https://www.metmuseum.org/art/collection/search/464463
(2) https://www.britannica.com/biography/Saint-Francis-of-Assisi
(3) Kilgore, Claire. 2017. "Chapter 1: Structure, Visibility, and Materiality in Early Reliquaries." In Viewing Heaven: Rock Crystal, Reliquaries, and Transparency in Fourteenth-Century Aachen, 10-28. Lincoln, Nebraska: University of Nebraska-Lincoln.